[CentOS] Slow graphics with ATI FirePro 2260

Hello-

I installed CentOS 5.5 on a DELL Machine with ATI Firepro 2260 graphics
card. I'm using GNOME for the graphical environment but the display is
refreshing very slowly, e.g. scrolling a webpage or moving a window around.
Any idea how to solve this issue.

Regards,

Wael
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